Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 14, Problem 11RQ
How did Meselson and Stahl support Watson and Crick’s double-helix model?
- They demonstrated that each strand serves as a template tor synthesizing a new strand of DNA
- They showed that the DNA strands break and recombine without losing genetic material
- They proved that DNA maintains a double helix structure while undergoing semi conservative replication
- They demonstrated that conservative replication maintains the complementary base pairing of each DNA helix.
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Which of the following is not included in the Watson-Crick model of DNA structure?
The strands run parallel to each other.
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While trying to determine the structure of DNA, Watson and Crick at one point proposed that like bases are bonded to like bases. For example, thymine would be bonded to thymine, cytosine would be bonded to cytosine, and so on. Explain why this proposed model would not fit based on what was discovered to be true about DNA.
What evidence did Watson and Crick have at their disposal in 1953? What was their approach in arriving at the structure of DNA?
Chapter 14 Solutions
Biology 2e
Ch. 14 - Figure 14.10 In eukaryotic cells, DNA and RNA...Ch. 14 - Figure 14.14 You isolate a cell strain in which...Ch. 14 - Figure 14.21 A fr am eshift mutation that results...Ch. 14 - If DNA of a particular species was analyzed and it...Ch. 14 - The experiments by Hershey and Chase helped...Ch. 14 - Bacterial transformation is a major concern in...Ch. 14 - DNA double helix does not have which of the...Ch. 14 - In eukaryotes, what is the DNA wrapped around?...Ch. 14 - Meselson and Stahl's experiments proved that DNA...Ch. 14 - If the sequence of the 5'-3' strand is AATGCTAC,...
Ch. 14 - How did Meselson and Stahl support Watson and...Ch. 14 - Which of the following components is not involved...Ch. 14 - Which of the following does the enzyme primase...Ch. 14 - In which direction does DNA replication take...Ch. 14 - A scientist randomly mutates the DNA of a...Ch. 14 - The ends of the linear chromosomes are maintained...Ch. 14 - Which of the following is not a true statement...Ch. 14 - During proofreading, which of the following...Ch. 14 - The initial mechanism for repairing nucleotide...Ch. 14 - A scientist creates fruit fly larvae with a...Ch. 14 - Explain Griffith's transformation experiments What...Ch. 14 - Why were radioactive sulfur and phosphorous used...Ch. 14 - When Chargaffwas performing his experiments, the...Ch. 14 - Provide a brief summary of the Sanger sequencing...Ch. 14 - Describe the structure and complementary base...Ch. 14 - Prokaryotes have a single circular chromosome...Ch. 14 - How did the scientific community learn that DNA...Ch. 14 - Imagine the Meselson and Stahl experiments had...Ch. 14 - DNA replication is bidirectional and...Ch. 14 - What are Okazaki fragments and how they are...Ch. 14 - If the rate of replication in a particular...Ch. 14 - Explain the events taking place at the replication...Ch. 14 - What is the role of a primer in DNA replication?...Ch. 14 - Quinolone antibiotics treat bacterial infections...Ch. 14 - How do the linear chromosomes in eukaryotes ensure...Ch. 14 - What is the consequence of mutation of a mismatch...Ch. 14 - An adult with a history of tanning has his genome...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- what is the significance of famous dna structure experiment?arrow_forwardIf DNA replication followed the dispersive model of replication, how would the outcomes of the Meselson-Stahl experiment change? Describe the composition of DNA samples after one and two rounds of replication, and how this is different from the findings of the original experiment.arrow_forwardAll of the following statements are correct EXCEPT a. DNA forms described by Watson and Crick have right handed helix except of Z-DNA form b. In case of Z-DNA form, the deoxyribose phosphate backbone forms a "Zigzag structure" c. Inverted DNA sequence repeat that happens within each individual strand of the DNA, called cruciform d. Plasmid carries genes that convey antibiotic resistance to the host bacteriumarrow_forward
- Which property of DNA double helix led Watson and Crick to hypothesisesemi-conservative mode of DNA replication? Explain.arrow_forwardDescribe the DNA helix proposed by Watson and Crickarrow_forwardDoes the design of the Hershey–Chase experiment distinguish between DNA and RNA as the molecule serving as the genetic material? Why or why not?arrow_forward
- DNA from actively dividing bacteria was isolated and examined to find two groups of DNA. One group DNA included very large molecules (thousands or even millions of nucleotides long), and the other included short stretches of DNA (several hundred to a few thousand nucleotides in length). What was the researcher actually seeing in these two groups? Group of answer choices mRNA molecules and siRNA molecules Okazaki fragments and RNA primers leading strands and Okazaki fragments leading strands and RNA primersarrow_forwardWatson and Crick used an approach called model building to deduce the structure of the DNA double helix.How does this differ from the more conventional experimental approach that is undertaken in a research laboratory? In this regard, why was the experiment of Meselsonand Stahl considered to be of such critical importance?arrow_forwardIn which thing the experimental proof for semiconservative replication of DNA was first shown?arrow_forward
- What are some of the ways that organisms use to ensure the fidelity of DNA replication? Why is it important that the fidelity of DNA replication is an evolutionary balance between faithful replication and the existence of some errors? Escherichia coli and other bacteria methylate adenines on the original strand to distinguish the original strand from the newly replicated strand of DNA. Why is this distinction important?arrow_forwardA scientist successfully analyzed a new micro-organism. Because this micro-organism contains double-stranded DNA as genetic material, Meselson-Stahl techniques was employed. The following shows the results of the experiment where L – light chain (14N) and H – heavy chain (15N).What is the mechanism of replication in this organism in the picture? Explain how you got the answer. The following piece of DNA is sequenced using the dideoxy method: 3’-AAGCGGCTAATCC-5’. Accidentally, you forget to include dATP in the four reactions that contain a ddNTP. What is the sequence of the daughter strand produced from this sequencing activity? Show the process. The following piece of DNA is sequenced using the dideoxy method: 3’-AAGCGGCTAATCC-5’. Accidentally, you forget to include dATP in the four reactions that contain a ddNTP. How many bands will appear in the lane containing ddATP? Show the process. The following piece of DNA is sequenced using the dideoxy method: 3’-AAGCGGCTAATCC-5’.…arrow_forwardWhat sequence of bases on one strand of DNA (reading in the 3′ to 5′ direction) is complementary to the sequence 5′ T-A-T-G-C-A-G 3′ on the other strand?arrow_forward
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